'82 Tach issues with engine upgrade
Thread Starter
Navigator
Joined: Feb 2014
Posts: 9
Likes: 0
From: WV
'82 Tach issues with engine upgrade
I have an '82 that I bought last year for a project and am having a few issues I was hoping someone could help me with. First off the CFI was removed and replaced by a 4 barrel. I can't seem to get the tach to work. I installed a new HEI distributor and connected up the tach wire but I am getting nothing. Is there something I am missing with the ECM possibly? I have several other issues too but I am starting with this one.
Last edited by wvbuckshot; Feb 4, 2014 at 04:55 PM.
Thread Starter
Navigator
Joined: Feb 2014
Posts: 9
Likes: 0
From: WV
I bought this distributor at a swap meet. It is new but had no box or paperwork. The car also had an Accel dist. and coil when I bought it with the tach connected correctly but it didn't work then either. You think the issue could be with the filter?
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
What is the tach doing? Any needle movement?
The tach isn't controlled by the ECM, it gets the signal from the distributor.
Willcox
Thread Starter
Navigator
Joined: Feb 2014
Posts: 9
Likes: 0
From: WV
The tach does move when you turn the key on. I will try and remove the filter and see what happens. I just ordered a new chevy performance crate engine and have started to remove the old engine. It will be a week or so before I get it all back together. Thanks for the help.
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Here is a diagnostic help page we did years ago.. It will walk you through how to remove the tach and how to test the connection clips. 
Corvette Tachometer Testing, Removal, Board Installation, Video Link 1978-1982 When you get to the link, click on supporting document.
Corvette Tachometer Testing, Removal, Board Installation, Video Link 1978-1982 When you get to the link, click on supporting document.
Thread Starter
Navigator
Joined: Feb 2014
Posts: 9
Likes: 0
From: WV
Here is a diagnostic help page we did years ago.. It will walk you through how to remove the tach and how to test the connection clips.
Corvette Tachometer Testing, Removal, Board Installation, Video Link 1978-1982 When you get to the link, click on supporting document.
Corvette Tachometer Testing, Removal, Board Installation, Video Link 1978-1982 When you get to the link, click on supporting document.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Safety Car
Joined: Oct 2015
Posts: 4,782
Likes: 223
From: Lebanon Pa
I just bought my wife a 82 corvette, standard,the tach works but it's about 2000rpm to high... It moves up when accelerated,and down when letting off the gas... Not sure if it's the gage or sender... Jeff
Race Director
Joined: May 2006
Posts: 18,735
Likes: 2,582
did you read the link in the post right above yours?
http://repairs.willcoxcorvette.com/c...-1982/?hID=290
http://repairs.willcoxcorvette.com/c...-1982/?hID=290